Regulating steam-supply to compound engines



3 Sheets-Sheet 1.

(No Model.)

G. 'WESTINGHOUSR Jr. REGULATING STEAM SUPPLY TU *COMPOUND ENGINES.

No. 309,591. Patented Deo. 23, 1884.

Illlllllllllllllllll (No Model.) 3 Sheets- Sheet 2.

G. WESTINGHOUSE, Jr. l REGULATING STEAM SUPPLY T0 GOMPOUND ENGINES.

No. 309,591. Patented Deo. 23,1884.

'W6/@M i (No Model.) 3 Sheets-Sheet 3.

Gi WESTINGHOUSE, Jr.

EEGULATING STEAM SUPPLY To GOMEOUND ENGINES.

No. 309,591. Patented Deo. Z3. 1884.

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GEGRGE VVESTINGHOUSE, JR., OF PlTTSBUR-G, PENNSYLVANIA.

REGULATENG STElVl-SUPPLY T0 COMPOUN ENGINES.

SPECIFICATONi'orming part of Letters Patent No. 309,591, dated December23, 1884. Application filed March 14, i884. (No model.)

To @ZZ whom/ t may concern,.-

Be it known that I,4 Gnonen Wnsrrnc- HOUSE, Jr., a citizen of the UnitedStates, residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented or discovered certain new and usefulImprovements in Regulating Steam-Supply to Compound Engines, of whichimprovements the following is a specification.

Io In the accompanying drawings, which make part of this specication,Figure l, Sheet l, isatransverse section through the cylinders of atwo-cylinder compound reciprocating engine, illustrating an applicationof my invention; Fig. 2, Sheet 2, a longitudinal section through onecylinder of a compound rotary engine, illustrating another application;and Fig. 8, Sheet 3, a transverse section at the line .fr .fr of Fig. 2.

2o The object of my invention is to enable increase of power above thatnormally and usually exerted to be developed in the operation of asteam-engine in accordance with and as required by additional resistanceencountered in the performance of temporarily increased duty imposedfrom time to time upon the engine.

To this end my improvements consist in a novel method of and means foreffecting an 3o increased supply of steam to two or more pistons of anengine upon the application of increased duty thereto, and in thecombination, with an engine having two or more pistons, of a governor orregulator and supply ports 3 5 and passages controlled by said governor,and leading from a communication with a main steam-pipe to the supplysides of said pistons, all as hereinafter more fully set forth.

In the operation of steam-engines of various 4o descriptions a temporaryincrease of power is frequently necessary or desirable, to enable theengine to perform duty in excess of that within its normal capacity,such duty being comparatively infrequent or of such short duration asnot to render economical the permanent employment of an engine of higherpower than that which is required to be developed under ordinaryconditions of operation. To render such increase of power practicable inan engine having more than one piston, as in a compound `reciprocatingengine,

or a rotary engine having a series of pistons, whether simple orcompound, I automatically and coincidently supply two or more pistons ofthe engine with steam under and in accordance with the degree ofadditional duty imposed, regulating such increased supply by andterminating it with such additional imposition of duty.

In the practice of my invention I provide 6o a governor or regulator, l,of any suitable construction, and connect the same with agovernor-valve, 2, iitting seats in a valvechest, 3, and controlling theadmission of steam from a main supply-pipe, Ll, to a main steampassage,5, leading to the primary piston of the engine, and an auxiliary orsupplemental steam-passage, 6, leading to a secondary piston-#that is tosay, one which is subsequent to the primary piston in the reception of7o steam. The capacity of the main steam-pas sage 5 and the relation ofthe governor-valve thereto are such that when said passage is fullyopened to the steam-pipe 4 bythe move- .ment of the governor-valve themaximum quantity of steam required in the normal operation of the engineshall be supplied to the primary pistou thereof through the mainsteam-passage 5, and the valve is so set relatively to the opening ofthe supplemental 8o steam-passage 6 that said passage shall not beopened to the steam-pipe until after the maxi-- mum admission of steamthrough the passage 5 shall have been effected. Upon theapplication ofduty greater than that within the S5 capacity of the engine under themaximum steam-supply afforded tothe primary piston through the passage 5the continued traverse of the governor-valve, effected by the increasedresistance upon the governor, opens 9o the supplemental steam-passage 6to the steampipe 4 to a greater or less degree, proportionate to theresistance, and by affording a further supply of steam from the mainsteampipe 4t through the passage 6 to the primary 95 piston, or toanother or secondary piston of the engine, correspondingly increases itspower during the continuance of the duty imposed, upon the cessation ofwhich the governor closes the supplemental passage 6, and 10o continuesits regulation for the normal 0peration ofwthe engine by controlling themain passage to the primary piston, in the usual manner.

My invention is illustrated in Fig. 1 as applied in connection with atwo-cylinder compound reciprocating engine, the main steampassage 5supplying steam to the steam-chest 7, and thereby to theprimary'piston-that is to say, the piston of the high-pressure cylinderS-and the supplemental steam-passage 6 supplying, under increased dutyof the engine, steam to the steam-chest 9 and piston of the low-pressurecylinder 10, said piston, which in the construction is a secondarypiston, thereby receiving steam directly from the boiler in addition toits normal supply-to wit, the exhaust-steam of the high-pressurecylinder 8.

vIt Will be obvious that in an engine having more than one low-pressurecylinder' and piston the supply of steam directly to each of saidcylinders and pistons may be eiibcted by supplemental passagescontrolled by the governor-valvc in a similar manner.

Figs. 2 and 3 illustrate the application of ymy invention to a compoundrotary engine having two or more cylinders, 11, each of which is fittedwith a piston-drum, 12, secured upon and adapted to rotate with a shaft,13, and carrying a series of pistons, l-l, the construction of saidengine being fully set forth in another application for Letters Iatentby me led March 10, 1884, Serial No. 123,590. In the normal operation ofthe engine steam is admitted, as before described, through the mainsteam-passage 5, and acts successively upon the series of pistons of thehigh-pressure cylinder in the rotation of the drum. Upon the applicationof duty greater than the maximum in normal operation steam is admittedthrough the supplemental passage 6 to the eX- haust-passage leading tothe low-pressure cylindcrs, and acts directly upon the pistons thereof,as in the former case.

The engine'may be constructed to use steam expansively or cut off'at afraction of the active traverse of its pistons when in ordinaryoperation, and one supplemental passage may be led into thehigh-pressure cylinder, so as, when opened by the governor-Valve, tosupply steam thereto for the full stroke or active traverse of itspistons, while a second supplemental passage, alsoopened by thegovernorvalve under further increase of duty, supplies steam directly tothe low-pressure pistons. Such specific embodiment of my inventionbeing, however, set Yforth in my application Serial No. 123,590aforesaid, is not, per se, claimed as of my present invention.

I claim herein as my invention- 1. The improved method of increasing thedevelopment of power from steam-engines, which consists in affording adirect supply of steam coincidently to each of two or more pistons of asteam-engine in accordance with the application of an increased duty orresistance thereto, and by regulating mechanism actuated to effect saidsupply in and by said application, substantially as set forth.

2. The combination, with a compound engine, of a governor, agovernor-valve, and passages controlled by said valve and establishingdirect and independent communication from the main steam-supply pipe tothe receiving side of two or more pistons of the engine, substantiallyas set forth.

In testimony whereof I have hereunto set my hand.

GEORGE W'ESTINGHOUSE, JR.

lVitnesses:

R. H. VHrTrLEsnY, J. SNOWDEN BELL.

